Gm7

 ======
 ~~~~~~
 ------
 1-11-1  3rd fret
 ------
 ||||||
 ------
 |2||||
 ------
 ||||4|
 ------
 ||||||
 ------
 GDFBFG 
    b

or:

 ======
 ~~~~~~
 ------
 1-1111  3rd fret
 ------
 ||||||
 ------
 |3||||
 ------
 ||||||
 ------
 ||||||
 ------
 GDFBDG 
    b

or:

 XX
 ======
 ~~~~~~
 ------
 ||1|||  5th fret
 ------
 ||||23
 ------
 |||4||
 ------
 ||||||
 ------
   GDFB
      b

or:

 X
 ======
 ~~~~~~
 ------
 ||1-1|  8th fret
 ------
 |2|3|4
 ------
 ||||||
 ------
  GBFGD
   b

Notes:  I  : G
       IIIb: Bb
        V  : D
       VIIb: F